# CVE-2018-8271: Windows Information Disclosure Vulnerability CVE-2018-8271 is fixed in 31 products on 1 platform, first by KB4457131, released September 11, 2018. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2018-8271 - Priority: Routine - CVSS: 2.5 (Important) - EPSS: 0.0278 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Vendor exploitability assessment: Exploitation Less Likely - Published: Sep 11, 2018 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2018-8271 ## Description

An information disclosure vulnerability exists in Windows when the Windows bowser.sys kernel-mode driver fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could potentially disclose contents of System memory.

To exploit this vulnerability, an attacker would have to log on to the system first and then run a specially crafted application in user mode.

The security update addresses the vulnerability by correcting how the bowser.sys kernel-mode driver handles objects in memory.

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Windows 10 Version 1607 for 32-bit Systems | 14393.2485 | [KB4457131](https://patchblox.com/security/data/fix/microsoft/kb4457131.md) | Sep 11, 2018 | | Microsoft | Windows 10 Version 1607 for x64-based Systems | 14393.2485 | [KB4457131](https://patchblox.com/security/data/fix/microsoft/kb4457131.md) | Sep 11, 2018 | | Microsoft | Windows 10 Version 1703 for 32-bit Systems | 15063.1324 | [KB4457138](https://patchblox.com/security/data/fix/microsoft/kb4457138.md) | Sep 11, 2018 | | Microsoft | Windows 10 Version 1703 for x64-based Systems | 15063.1324 | [KB4457138](https://patchblox.com/security/data/fix/microsoft/kb4457138.md) | Sep 11, 2018 | | Microsoft | Windows 10 Version 1709 for 32-bit Systems | 16299.665 | [KB4457142](https://patchblox.com/security/data/fix/microsoft/kb4457142.md) | Sep 11, 2018 | | Microsoft | Windows 10 Version 1709 for x64-based Systems | 16299.665 | [KB4457142](https://patchblox.com/security/data/fix/microsoft/kb4457142.md) | Sep 11, 2018 | | Microsoft | Windows 10 Version 1803 for 32-bit Systems | 17134.285 | [KB4457128](https://patchblox.com/security/data/fix/microsoft/kb4457128.md) | Sep 11, 2018 | | Microsoft | Windows 10 Version 1803 for x64-based Systems | 17134.285 | [KB4457128](https://patchblox.com/security/data/fix/microsoft/kb4457128.md) | Sep 11, 2018 | | Microsoft | Windows 10 for 32-bit Systems | 10240.17976 | [KB4457132](https://patchblox.com/security/data/fix/microsoft/kb4457132.md) | Sep 11, 2018 | | Microsoft | Windows 10 for x64-based Systems | 10240.17976 | [KB4457132](https://patchblox.com/security/data/fix/microsoft/kb4457132.md) | Sep 11, 2018 | | Microsoft | Windows 7 for 32-bit Systems Service Pack 1 | | [KB4457144](https://patchblox.com/security/data/fix/microsoft/kb4457144.md) | Sep 11, 2018 | | Microsoft | Windows 7 for 32-bit Systems Service Pack 1 | | [KB4457145](https://patchblox.com/security/data/fix/microsoft/kb4457145.md) | Sep 11, 2018 | | Microsoft | Windows 7 for x64-based Systems Service Pack 1 | | [KB4457144](https://patchblox.com/security/data/fix/microsoft/kb4457144.md) | Sep 11, 2018 | | Microsoft | Windows 7 for x64-based Systems Service Pack 1 | | [KB4457145](https://patchblox.com/security/data/fix/microsoft/kb4457145.md) | Sep 11, 2018 | | Microsoft | Windows 8.1 for 32-bit systems | | [KB4457129](https://patchblox.com/security/data/fix/microsoft/kb4457129.md) | Sep 11, 2018 | | Microsoft | Windows 8.1 for 32-bit systems | | [KB4457143](https://patchblox.com/security/data/fix/microsoft/kb4457143.md) | Sep 11, 2018 | | Microsoft | Windows 8.1 for x64-based systems | | [KB4457129](https://patchblox.com/security/data/fix/microsoft/kb4457129.md) | Sep 11, 2018 | | Microsoft | Windows 8.1 for x64-based systems | | [KB4457143](https://patchblox.com/security/data/fix/microsoft/kb4457143.md) | Sep 11, 2018 | | Microsoft | Windows RT 8.1 | | [KB4457129](https://patchblox.com/security/data/fix/microsoft/kb4457129.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 | | [KB4457144](https://patchblox.com/security/data/fix/microsoft/kb4457144.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 | | [KB4457145](https://patchblox.com/security/data/fix/microsoft/kb4457145.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4457144](https://patchblox.com/security/data/fix/microsoft/kb4457144.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4457145](https://patchblox.com/security/data/fix/microsoft/kb4457145.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB4457144](https://patchblox.com/security/data/fix/microsoft/kb4457144.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB4457145](https://patchblox.com/security/data/fix/microsoft/kb4457145.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 | | [KB4457984](https://patchblox.com/security/data/fix/microsoft/kb4457984.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 | | [KB4458010](https://patchblox.com/security/data/fix/microsoft/kb4458010.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | | [KB4457984](https://patchblox.com/security/data/fix/microsoft/kb4457984.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | | [KB4458010](https://patchblox.com/security/data/fix/microsoft/kb4458010.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for Itanium-Based Systems Service Pack 2 | | [KB4457984](https://patchblox.com/security/data/fix/microsoft/kb4457984.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for Itanium-Based Systems Service Pack 2 | | [KB4458010](https://patchblox.com/security/data/fix/microsoft/kb4458010.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 | | [KB4457984](https://patchblox.com/security/data/fix/microsoft/kb4457984.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 | | [KB4458010](https://patchblox.com/security/data/fix/microsoft/kb4458010.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | | [KB4457984](https://patchblox.com/security/data/fix/microsoft/kb4457984.md) | Sep 11, 2018 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | | [KB4458010](https://patchblox.com/security/data/fix/microsoft/kb4458010.md) | Sep 11, 2018 | | Microsoft | Windows Server 2012 | | [KB4457135](https://patchblox.com/security/data/fix/microsoft/kb4457135.md) | Sep 11, 2018 | | Microsoft | Windows Server 2012 | | [KB4457140](https://patchblox.com/security/data/fix/microsoft/kb4457140.md) | Sep 11, 2018 | | Microsoft | Windows Server 2012 (Server Core installation) | | [KB4457135](https://patchblox.com/security/data/fix/microsoft/kb4457135.md) | Sep 11, 2018 | | Microsoft | Windows Server 2012 (Server Core installation) | | [KB4457140](https://patchblox.com/security/data/fix/microsoft/kb4457140.md) | Sep 11, 2018 | | Microsoft | Windows Server 2012 R2 | | [KB4457129](https://patchblox.com/security/data/fix/microsoft/kb4457129.md) | Sep 11, 2018 | | Microsoft | Windows Server 2012 R2 | | [KB4457143](https://patchblox.com/security/data/fix/microsoft/kb4457143.md) | Sep 11, 2018 | | Microsoft | Windows Server 2012 R2 (Server Core installation) | | [KB4457129](https://patchblox.com/security/data/fix/microsoft/kb4457129.md) | Sep 11, 2018 | | Microsoft | Windows Server 2012 R2 (Server Core installation) | | [KB4457143](https://patchblox.com/security/data/fix/microsoft/kb4457143.md) | Sep 11, 2018 | | Microsoft | Windows Server 2016 | 14393.2485 | [KB4457131](https://patchblox.com/security/data/fix/microsoft/kb4457131.md) | Sep 11, 2018 | | Microsoft | Windows Server 2016 (Server Core installation) | 14393.2485 | [KB4457131](https://patchblox.com/security/data/fix/microsoft/kb4457131.md) | Sep 11, 2018 | | Microsoft | Windows Server, version 1709 (Server Core Installation) | 16299.665 | [KB4457142](https://patchblox.com/security/data/fix/microsoft/kb4457142.md) | Sep 11, 2018 | | Microsoft | Windows Server, version 1803 (Server Core Installation) | 17134.285 | [KB4457128](https://patchblox.com/security/data/fix/microsoft/kb4457128.md) | Sep 11, 2018 | --- Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo